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Frequently Asked Questions

The ONTF Meniscus Lens can be made of all types of fine-annealing colourless optical glass and fused silica.

The allowed values for the radius R1 and R2 of the ONTF Meniscus Lens are 2.5 to 12000.

The diameter range for the ONTF Meniscus Lens is 3 to 180 mm.

The surface quality of the ONTF Meniscus Lens is 5/3 х 0.16 acc. to ISO10110-7 or PII – PV acc. to GOST 11141-84.

The centering tolerance for the ONTF Meniscus Lens is ≤1.0 arcmin.

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